1cd831bd7Sths /* 27a5ca864Sbellard * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> 37a5ca864Sbellard * 47a5ca864Sbellard * Network Block Device 57a5ca864Sbellard * 67a5ca864Sbellard * This program is free software; you can redistribute it and/or modify 77a5ca864Sbellard * it under the terms of the GNU General Public License as published by 87a5ca864Sbellard * the Free Software Foundation; under version 2 of the License. 97a5ca864Sbellard * 107a5ca864Sbellard * This program is distributed in the hope that it will be useful, 117a5ca864Sbellard * but WITHOUT ANY WARRANTY; without even the implied warranty of 127a5ca864Sbellard * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 137a5ca864Sbellard * GNU General Public License for more details. 147a5ca864Sbellard * 157a5ca864Sbellard * You should have received a copy of the GNU General Public License 168167ee88SBlue Swirl * along with this program; if not, see <http://www.gnu.org/licenses/>. 177a5ca864Sbellard */ 187a5ca864Sbellard 19d38ea87aSPeter Maydell #include "qemu/osdep.h" 20c2a3d7daSEric Blake #include <getopt.h> 21c2a3d7daSEric Blake #include <libgen.h> 22c2a3d7daSEric Blake #include <pthread.h> 23c2a3d7daSEric Blake 24a8d25326SMarkus Armbruster #include "qemu-common.h" 25da34e65cSMarkus Armbruster #include "qapi/error.h" 26f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 2726f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 28b3838a40SPeter Lieven #include "block/block_int.h" 29737e150eSPaolo Bonzini #include "block/nbd.h" 306a1751b7SAlex Bligh #include "qemu/main-loop.h" 310b8fa32fSMarkus Armbruster #include "qemu/module.h" 32922a01a0SMarkus Armbruster #include "qemu/option.h" 33537b41f5SPaolo Bonzini #include "qemu/error-report.h" 340ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 3558369e22SPaolo Bonzini #include "qemu/bswap.h" 3639ca463eSDenis V. Lunev #include "qemu/log.h" 3753fabd4bSPaolo Bonzini #include "qemu/systemd.h" 388c116b0eSWenchao Xia #include "block/snapshot.h" 39452fcdbcSMarkus Armbruster #include "qapi/qmp/qdict.h" 40d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 410ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 42d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 43e4849c1dSDaniel P. Berrange #include "io/net-listener.h" 44c2297088SDaniel P. Berrange #include "crypto/init.h" 4539ca463eSDenis V. Lunev #include "trace/control.h" 46be377133SEric Blake #include "qemu-version.h" 477a5ca864Sbellard 483c1fa35dSEric Blake #ifdef __linux__ 493c1fa35dSEric Blake #define HAVE_NBD_DEVICE 1 503c1fa35dSEric Blake #else 513c1fa35dSEric Blake #define HAVE_NBD_DEVICE 0 523c1fa35dSEric Blake #endif 533c1fa35dSEric Blake 54cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 55fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 56fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 57fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 58fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 59fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 60fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 61fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 62ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 63b25e12daSDaniel P. Berrange #define QEMU_NBD_OPT_TLSAUTHZ 264 64637bc5a5SMax Reitz #define QEMU_NBD_OPT_PID_FILE 265 657a5ca864Sbellard 66bd31c214SEric Blake #define MBR_SIZE 512 67bd31c214SEric Blake 689d976580SPhilippe Mathieu-Daudé static NBDExport *export; 69b1d8e52eSblueswir1 static int verbose; 70a517e88bSPaolo Bonzini static char *srcpath; 71bd269ebcSMarkus Armbruster static SocketAddress *saddr; 727860a380SPaolo Bonzini static int persistent = 0; 737860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 74a61c6782SPaolo Bonzini static int shared = 1; 75a61c6782SPaolo Bonzini static int nb_fds; 76e4849c1dSDaniel P. Berrange static QIONetListener *server; 77145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 78b25e12daSDaniel P. Berrange static const char *tlsauthz; 797a5ca864Sbellard 807a5ca864Sbellard static void usage(const char *name) 817a5ca864Sbellard { 82b033cd86SPaolo Bonzini (printf) ( 837a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 8468b96f15SEric Blake " or: %s -L [OPTIONS]\n" 8568b96f15SEric Blake "QEMU Disk Network Block Device Utility\n" 867a5ca864Sbellard "\n" 877a5ca864Sbellard " -h, --help display this help and exit\n" 887a5ca864Sbellard " -V, --version output version information and exit\n" 897a5ca864Sbellard "\n" 90b033cd86SPaolo Bonzini "Connection properties:\n" 91b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 92b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 93b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 94b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 95b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 96b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 97b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 98f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 99f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 100b033cd86SPaolo Bonzini "\n" 101b033cd86SPaolo Bonzini "Exposing part of the image:\n" 102b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 103b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 104636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 105b033cd86SPaolo Bonzini "\n" 1060ab3b337SDaniel P. Berrange "General purpose options:\n" 10768b96f15SEric Blake " -L, --list list exports available from another NBD server\n" 1080ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1090ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 110f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 111b25e12daSDaniel P. Berrange " --tls-authz=ID use id of an earlier --object to provide\n" 112b25e12daSDaniel P. Berrange " authorization\n" 11339ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 11439ca463eSDenis V. Lunev " specify tracing options\n" 115ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 116ffb31e1dSMax Reitz " once the server is running\n" 117637bc5a5SMax Reitz " --pid-file=PATH store the server's process ID in the given file\n" 1183c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1193c1fa35dSEric Blake "\n" 120b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 121b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 122b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 123b033cd86SPaolo Bonzini #endif 124b033cd86SPaolo Bonzini "\n" 125b033cd86SPaolo Bonzini "Block device options:\n" 1264323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 127b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1288c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1298c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1308c116b0eSWenchao Xia " the temporary one\n" 1318c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1328c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1338c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1348c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1358c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 136b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 13739a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 13839a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 139b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1406883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 14177c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 142b033cd86SPaolo Bonzini "\n" 143f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 14468b96f15SEric Blake , name, name, NBD_DEFAULT_PORT, "DEVICE"); 1457a5ca864Sbellard } 1467a5ca864Sbellard 1477a5ca864Sbellard static void version(const char *name) 1487a5ca864Sbellard { 1497a5ca864Sbellard printf( 1507e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1517a5ca864Sbellard "Written by Anthony Liguori.\n" 1527a5ca864Sbellard "\n" 153be377133SEric Blake QEMU_COPYRIGHT "\n" 1547a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1557a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 156315bc7aaSths , name); 1577a5ca864Sbellard } 1587a5ca864Sbellard 1597a5ca864Sbellard struct partition_record 1607a5ca864Sbellard { 1617a5ca864Sbellard uint8_t bootable; 1627a5ca864Sbellard uint8_t start_head; 1637a5ca864Sbellard uint32_t start_cylinder; 1647a5ca864Sbellard uint8_t start_sector; 1657a5ca864Sbellard uint8_t system; 1667a5ca864Sbellard uint8_t end_head; 1677a5ca864Sbellard uint8_t end_cylinder; 1687a5ca864Sbellard uint8_t end_sector; 1697a5ca864Sbellard uint32_t start_sector_abs; 1707a5ca864Sbellard uint32_t nb_sectors_abs; 1717a5ca864Sbellard }; 1727a5ca864Sbellard 1737a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1747a5ca864Sbellard { 1757a5ca864Sbellard r->bootable = p[0]; 1767a5ca864Sbellard r->start_head = p[1]; 1777a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1787a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1797a5ca864Sbellard r->system = p[4]; 1807a5ca864Sbellard r->end_head = p[5]; 1817a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1827a5ca864Sbellard r->end_sector = p[6] & 0x3f; 183ac97393dSMax Reitz 184773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 185773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1867a5ca864Sbellard } 1877a5ca864Sbellard 1884c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1899d26dfcbSEric Blake uint64_t *offset, uint64_t *size) 1907a5ca864Sbellard { 1917a5ca864Sbellard struct partition_record mbr[4]; 192bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1937a5ca864Sbellard int i; 1947a5ca864Sbellard int ext_partnum = 4; 195cb7cf0e3SRyota Ozaki int ret; 1967a5ca864Sbellard 197bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 198bd31c214SEric Blake if (ret < 0) { 199a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 20085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 201cb7cf0e3SRyota Ozaki } 2027a5ca864Sbellard 2037a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 204185b4338SPaolo Bonzini return -EINVAL; 2057a5ca864Sbellard } 2067a5ca864Sbellard 2077a5ca864Sbellard for (i = 0; i < 4; i++) { 2087a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 2097a5ca864Sbellard 210453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 2117a5ca864Sbellard continue; 212453b07b1SMax Reitz } 2137a5ca864Sbellard 2147a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 2157a5ca864Sbellard struct partition_record ext[4]; 216bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 2177a5ca864Sbellard int j; 2187a5ca864Sbellard 219bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 220bd31c214SEric Blake data1, sizeof(data1)); 221bd31c214SEric Blake if (ret < 0) { 222a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 22385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 224cb7cf0e3SRyota Ozaki } 2257a5ca864Sbellard 2267a5ca864Sbellard for (j = 0; j < 4; j++) { 2277a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 228453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2297a5ca864Sbellard continue; 230453b07b1SMax Reitz } 2317a5ca864Sbellard 2327a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2337a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2347a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2357a5ca864Sbellard return 0; 2367a5ca864Sbellard } 2377a5ca864Sbellard } 2387a5ca864Sbellard ext_partnum += 4; 2397a5ca864Sbellard } else if ((i + 1) == partition) { 2407a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2417a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2427a5ca864Sbellard return 0; 2437a5ca864Sbellard } 2447a5ca864Sbellard } 2457a5ca864Sbellard 246185b4338SPaolo Bonzini return -ENOENT; 2477a5ca864Sbellard } 2487a5ca864Sbellard 249bb345110SPaolo Bonzini static void termsig_handler(int signum) 250bb345110SPaolo Bonzini { 25123994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 252a61c6782SPaolo Bonzini qemu_notify_event(); 253bb345110SPaolo Bonzini } 254bb345110SPaolo Bonzini 255537b41f5SPaolo Bonzini 25668b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 25768b96f15SEric Blake const char *hostname) 25868b96f15SEric Blake { 25968b96f15SEric Blake int ret = EXIT_FAILURE; 26068b96f15SEric Blake int rc; 26168b96f15SEric Blake Error *err = NULL; 26268b96f15SEric Blake QIOChannelSocket *sioc; 26368b96f15SEric Blake NBDExportInfo *list; 26468b96f15SEric Blake int i, j; 26568b96f15SEric Blake 26668b96f15SEric Blake sioc = qio_channel_socket_new(); 26768b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 26868b96f15SEric Blake error_report_err(err); 26968b96f15SEric Blake return EXIT_FAILURE; 27068b96f15SEric Blake } 27168b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 27268b96f15SEric Blake &err); 27368b96f15SEric Blake if (rc < 0) { 27468b96f15SEric Blake if (err) { 27568b96f15SEric Blake error_report_err(err); 27668b96f15SEric Blake } 27768b96f15SEric Blake goto out; 27868b96f15SEric Blake } 27968b96f15SEric Blake printf("exports available: %d\n", rc); 28068b96f15SEric Blake for (i = 0; i < rc; i++) { 28168b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 28268b96f15SEric Blake if (list[i].description && *list[i].description) { 28368b96f15SEric Blake printf(" description: %s\n", list[i].description); 28468b96f15SEric Blake } 28568b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 286c4e2aff8SMax Reitz static const char *const flag_names[] = { 287c4e2aff8SMax Reitz [NBD_FLAG_READ_ONLY_BIT] = "readonly", 288c4e2aff8SMax Reitz [NBD_FLAG_SEND_FLUSH_BIT] = "flush", 289c4e2aff8SMax Reitz [NBD_FLAG_SEND_FUA_BIT] = "fua", 290c4e2aff8SMax Reitz [NBD_FLAG_ROTATIONAL_BIT] = "rotational", 291c4e2aff8SMax Reitz [NBD_FLAG_SEND_TRIM_BIT] = "trim", 292c4e2aff8SMax Reitz [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", 293c4e2aff8SMax Reitz [NBD_FLAG_SEND_DF_BIT] = "df", 294c4e2aff8SMax Reitz [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", 295c4e2aff8SMax Reitz [NBD_FLAG_SEND_RESIZE_BIT] = "resize", 296c4e2aff8SMax Reitz [NBD_FLAG_SEND_CACHE_BIT] = "cache", 2970a479545SEric Blake [NBD_FLAG_SEND_FAST_ZERO_BIT] = "fast-zero", 298c4e2aff8SMax Reitz }; 299c4e2aff8SMax Reitz 30068b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 30168b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 302c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 303c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 304c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 30568b96f15SEric Blake } 30668b96f15SEric Blake } 30768b96f15SEric Blake printf(" )\n"); 30868b96f15SEric Blake } 30968b96f15SEric Blake if (list[i].min_block) { 31068b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 31168b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 31268b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 31368b96f15SEric Blake } 31468b96f15SEric Blake if (list[i].n_contexts) { 31568b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 31668b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 31768b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 31868b96f15SEric Blake } 31968b96f15SEric Blake } 32068b96f15SEric Blake } 32168b96f15SEric Blake nbd_free_export_list(list, rc); 32268b96f15SEric Blake 32368b96f15SEric Blake ret = EXIT_SUCCESS; 32468b96f15SEric Blake out: 32568b96f15SEric Blake object_unref(OBJECT(sioc)); 32668b96f15SEric Blake return ret; 32768b96f15SEric Blake } 32868b96f15SEric Blake 32968b96f15SEric Blake 3303c1fa35dSEric Blake #if HAVE_NBD_DEVICE 331a517e88bSPaolo Bonzini static void *show_parts(void *arg) 332cd831bd7Sths { 333a6ac2313SPaolo Bonzini char *device = arg; 334cd831bd7Sths int nbd; 335cd831bd7Sths 336cd831bd7Sths /* linux just needs an open() to trigger 337cd831bd7Sths * the partition table update 338cd831bd7Sths * but remember to load the module with max_part != 0 : 339cd831bd7Sths * modprobe nbd max_part=63 340cd831bd7Sths */ 341cd831bd7Sths nbd = open(device, O_RDWR); 342fc19f8a0SPaolo Bonzini if (nbd >= 0) { 343cd831bd7Sths close(nbd); 344cd831bd7Sths } 345a517e88bSPaolo Bonzini return NULL; 346a517e88bSPaolo Bonzini } 347a517e88bSPaolo Bonzini 348a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 349a517e88bSPaolo Bonzini { 350a6ac2313SPaolo Bonzini char *device = arg; 3516dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 352d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 353d0d6ff58SDaniel P. Berrange int fd; 354a517e88bSPaolo Bonzini int ret; 355a517e88bSPaolo Bonzini pthread_t show_parts_thread; 3561ce52846SMax Reitz Error *local_error = NULL; 357a517e88bSPaolo Bonzini 358d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 359d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 360d0d6ff58SDaniel P. Berrange saddr, 361d0d6ff58SDaniel P. Berrange &local_error) < 0) { 36248bec07eSDaniel P. Berrange error_report_err(local_error); 363a517e88bSPaolo Bonzini goto out; 364a517e88bSPaolo Bonzini } 365a517e88bSPaolo Bonzini 366a8e2bb6aSVladimir Sementsov-Ogievskiy ret = nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), 367004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 368fc19f8a0SPaolo Bonzini if (ret < 0) { 3691ce52846SMax Reitz if (local_error) { 37078288671SMarkus Armbruster error_report_err(local_error); 3711ce52846SMax Reitz } 3720c544d73SPaolo Bonzini goto out_socket; 373a517e88bSPaolo Bonzini } 374a517e88bSPaolo Bonzini 375a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 376fc19f8a0SPaolo Bonzini if (fd < 0) { 377a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 378b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 3790c544d73SPaolo Bonzini goto out_socket; 380a6ac2313SPaolo Bonzini } 381a6ac2313SPaolo Bonzini 382004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 383fc19f8a0SPaolo Bonzini if (ret < 0) { 384be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 3850c544d73SPaolo Bonzini goto out_fd; 386a517e88bSPaolo Bonzini } 387a517e88bSPaolo Bonzini 388a517e88bSPaolo Bonzini /* update partition table */ 389a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 390a517e88bSPaolo Bonzini 391c1f8fdc3SPaolo Bonzini if (verbose) { 392a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 393a517e88bSPaolo Bonzini device, srcpath); 394c1f8fdc3SPaolo Bonzini } else { 395c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 396c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 397c1f8fdc3SPaolo Bonzini } 398a517e88bSPaolo Bonzini 399a517e88bSPaolo Bonzini ret = nbd_client(fd); 400a517e88bSPaolo Bonzini if (ret) { 4010c544d73SPaolo Bonzini goto out_fd; 402a517e88bSPaolo Bonzini } 403a517e88bSPaolo Bonzini close(fd); 404d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 4056dc1667dSEric Blake g_free(info.name); 406a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 407a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 408a517e88bSPaolo Bonzini 4090c544d73SPaolo Bonzini out_fd: 4100c544d73SPaolo Bonzini close(fd); 4110c544d73SPaolo Bonzini out_socket: 412d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 413a517e88bSPaolo Bonzini out: 4146dc1667dSEric Blake g_free(info.name); 415a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 416a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 417cd831bd7Sths } 4183c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 419cd831bd7Sths 420e4afbf4fSFam Zheng static int nbd_can_accept(void) 421a61c6782SPaolo Bonzini { 422df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 423a61c6782SPaolo Bonzini } 424a61c6782SPaolo Bonzini 4259d976580SPhilippe Mathieu-Daudé static void nbd_export_closed(NBDExport *export) 4267860a380SPaolo Bonzini { 4277860a380SPaolo Bonzini assert(state == TERMINATING); 4287860a380SPaolo Bonzini state = TERMINATED; 4297860a380SPaolo Bonzini } 4307860a380SPaolo Bonzini 431d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 432e4afbf4fSFam Zheng 4330c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 434a61c6782SPaolo Bonzini { 435a61c6782SPaolo Bonzini nb_fds--; 4360c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 4377860a380SPaolo Bonzini state = TERMINATE; 4387860a380SPaolo Bonzini } 439d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 4407860a380SPaolo Bonzini nbd_client_put(client); 441a61c6782SPaolo Bonzini } 442a61c6782SPaolo Bonzini 443e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 444e4849c1dSDaniel P. Berrange gpointer opaque) 445a61c6782SPaolo Bonzini { 4467860a380SPaolo Bonzini if (state >= TERMINATE) { 447e4849c1dSDaniel P. Berrange return; 4487860a380SPaolo Bonzini } 4497860a380SPaolo Bonzini 450a61c6782SPaolo Bonzini nb_fds++; 451d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 452b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 453d0d6ff58SDaniel P. Berrange } 454d0d6ff58SDaniel P. Berrange 455d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 456e4afbf4fSFam Zheng { 457e4afbf4fSFam Zheng if (nbd_can_accept()) { 458e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 459e4afbf4fSFam Zheng } else { 460e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 461e4afbf4fSFam Zheng } 462e4afbf4fSFam Zheng } 463e4afbf4fSFam Zheng 46448bec07eSDaniel P. Berrange 465bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 46648bec07eSDaniel P. Berrange const char *bindto, 46748bec07eSDaniel P. Berrange const char *port) 46848bec07eSDaniel P. Berrange { 469bd269ebcSMarkus Armbruster SocketAddress *saddr; 47048bec07eSDaniel P. Berrange 471bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 47248bec07eSDaniel P. Berrange if (sockpath) { 473bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 474bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 47548bec07eSDaniel P. Berrange } else { 4760399293eSEric Blake InetSocketAddress *inet; 477bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 478bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 4790399293eSEric Blake inet->host = g_strdup(bindto); 48048bec07eSDaniel P. Berrange if (port) { 4810399293eSEric Blake inet->port = g_strdup(port); 48248bec07eSDaniel P. Berrange } else { 4830399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 48448bec07eSDaniel P. Berrange } 48548bec07eSDaniel P. Berrange } 48648bec07eSDaniel P. Berrange 48748bec07eSDaniel P. Berrange return saddr; 48848bec07eSDaniel P. Berrange } 48948bec07eSDaniel P. Berrange 49048bec07eSDaniel P. Berrange 49177c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 49277c9aaefSDaniel P. Berrange .name = "file", 49377c9aaefSDaniel P. Berrange .implied_opt_name = "file", 49477c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 49577c9aaefSDaniel P. Berrange .desc = { 49677c9aaefSDaniel P. Berrange /* no elements => accept any params */ 49777c9aaefSDaniel P. Berrange { /* end of list */ } 49877c9aaefSDaniel P. Berrange }, 49977c9aaefSDaniel P. Berrange }; 50077c9aaefSDaniel P. Berrange 5010ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 5020ab3b337SDaniel P. Berrange .name = "object", 5030ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 5040ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 5050ab3b337SDaniel P. Berrange .desc = { 5060ab3b337SDaniel P. Berrange { } 5070ab3b337SDaniel P. Berrange }, 5080ab3b337SDaniel P. Berrange }; 5090ab3b337SDaniel P. Berrange 510495bf893SKevin Wolf static bool qemu_nbd_object_print_help(const char *type, QemuOpts *opts) 511495bf893SKevin Wolf { 512495bf893SKevin Wolf if (user_creatable_print_help(type, opts)) { 513495bf893SKevin Wolf exit(0); 514495bf893SKevin Wolf } 515495bf893SKevin Wolf return true; 516495bf893SKevin Wolf } 5170ab3b337SDaniel P. Berrange 518145614a1SDaniel P. Berrange 51968b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 52068b96f15SEric Blake Error **errp) 521145614a1SDaniel P. Berrange { 522145614a1SDaniel P. Berrange Object *obj; 523145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 524145614a1SDaniel P. Berrange 525145614a1SDaniel P. Berrange obj = object_resolve_path_component( 526145614a1SDaniel P. Berrange object_get_objects_root(), id); 527145614a1SDaniel P. Berrange if (!obj) { 528145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 529145614a1SDaniel P. Berrange id); 530145614a1SDaniel P. Berrange return NULL; 531145614a1SDaniel P. Berrange } 532145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 533145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 534145614a1SDaniel P. Berrange if (!creds) { 535145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 536145614a1SDaniel P. Berrange id); 537145614a1SDaniel P. Berrange return NULL; 538145614a1SDaniel P. Berrange } 539145614a1SDaniel P. Berrange 54068b96f15SEric Blake if (list) { 54168b96f15SEric Blake if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 54268b96f15SEric Blake error_setg(errp, 54368b96f15SEric Blake "Expecting TLS credentials with a client endpoint"); 54468b96f15SEric Blake return NULL; 54568b96f15SEric Blake } 54668b96f15SEric Blake } else { 547145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 548145614a1SDaniel P. Berrange error_setg(errp, 549145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 550145614a1SDaniel P. Berrange return NULL; 551145614a1SDaniel P. Berrange } 55268b96f15SEric Blake } 553145614a1SDaniel P. Berrange object_ref(obj); 554145614a1SDaniel P. Berrange return creds; 555145614a1SDaniel P. Berrange } 556145614a1SDaniel P. Berrange 557a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 558a721f53bSRichard W.M. Jones { 559a721f53bSRichard W.M. Jones if (*address == NULL) { 560a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 561a721f53bSRichard W.M. Jones } 562a721f53bSRichard W.M. Jones 563a721f53bSRichard W.M. Jones if (*port == NULL) { 564a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 565a721f53bSRichard W.M. Jones } 566a721f53bSRichard W.M. Jones } 567a721f53bSRichard W.M. Jones 568a721f53bSRichard W.M. Jones /* 569a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 570a721f53bSRichard W.M. Jones */ 571a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 572a721f53bSRichard W.M. Jones const char *sockpath, 573a721f53bSRichard W.M. Jones const char *address, 57468b96f15SEric Blake const char *port, 57568b96f15SEric Blake bool list) 576a721f53bSRichard W.M. Jones { 577a721f53bSRichard W.M. Jones if (device != NULL) { 578a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 579a721f53bSRichard W.M. Jones } 580a721f53bSRichard W.M. Jones 581a721f53bSRichard W.M. Jones if (sockpath != NULL) { 582a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 583a721f53bSRichard W.M. Jones } 584a721f53bSRichard W.M. Jones 585a721f53bSRichard W.M. Jones if (address != NULL) { 586a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 587a721f53bSRichard W.M. Jones } 588a721f53bSRichard W.M. Jones 589a721f53bSRichard W.M. Jones if (port != NULL) { 590a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 591a721f53bSRichard W.M. Jones } 592a721f53bSRichard W.M. Jones 59368b96f15SEric Blake if (list) { 59468b96f15SEric Blake return "List mode is incompatible with socket activation"; 59568b96f15SEric Blake } 59668b96f15SEric Blake 597a721f53bSRichard W.M. Jones return NULL; 598a721f53bSRichard W.M. Jones } 599145614a1SDaniel P. Berrange 600b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 601b3b5299dSKevin Wolf { 602b3b5299dSKevin Wolf job_cancel_sync_all(); 603b3b5299dSKevin Wolf bdrv_close_all(); 604b3b5299dSKevin Wolf } 605b3b5299dSKevin Wolf 6067a5ca864Sbellard int main(int argc, char **argv) 6077a5ca864Sbellard { 60826f54e9aSMarkus Armbruster BlockBackend *blk; 6097a5ca864Sbellard BlockDriverState *bs; 6109d26dfcbSEric Blake uint64_t dev_offset = 0; 611dbb38caaSEric Blake bool readonly = false; 612cd831bd7Sths bool disconnect = false; 613a721f53bSRichard W.M. Jones const char *bindto = NULL; 61448bec07eSDaniel P. Berrange const char *port = NULL; 61548bec07eSDaniel P. Berrange char *sockpath = NULL; 616a6ac2313SPaolo Bonzini char *device = NULL; 6179d26dfcbSEric Blake int64_t fd_size; 6188c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 6198c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 62068b96f15SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:B:L"; 6217a5ca864Sbellard struct option lopt[] = { 622aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 623aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 624aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 625aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 626aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 627aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 628aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 629aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 630636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 631aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 632aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 63368b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 634aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 635aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 636aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 637aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 638aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 639aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 640aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 641aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 642aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 643aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 644aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 645aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 646aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 647aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 648b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 649aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 650b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 651aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 65239ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 653ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 654637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 655660f11beSBlue Swirl { NULL, 0, NULL, 0 } 6567a5ca864Sbellard }; 6577a5ca864Sbellard int ch; 6587a5ca864Sbellard int opt_ind = 0; 659f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 66043b51011SEric Blake int partition = 0; 6614fbec260SMax Reitz int ret = 0; 66239a5235cSPaolo Bonzini bool seen_cache = false; 663ded9d2d5SPaolo Bonzini bool seen_discard = false; 66439a5235cSPaolo Bonzini bool seen_aio = false; 665a517e88bSPaolo Bonzini pthread_t client_thread; 666e6b63677SDaniel P. Berrange const char *fmt = NULL; 66734b5d2c6SMax Reitz Error *local_err = NULL; 668b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 6694fbec260SMax Reitz QDict *options = NULL; 67068b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 671b1a75b33SEric Blake const char *export_description = NULL; 672636192c4SEric Blake const char *bitmap = NULL; 673145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 67477c9aaefSDaniel P. Berrange bool imageOpts = false; 6756effd5bfSKevin Wolf bool writethrough = true; 67639ca463eSDenis V. Lunev char *trace_file = NULL; 677ffb31e1dSMax Reitz bool fork_process = false; 67868b96f15SEric Blake bool list = false; 679ffb31e1dSMax Reitz int old_stderr = -1; 680a721f53bSRichard W.M. Jones unsigned socket_activation; 681637bc5a5SMax Reitz const char *pid_file_name = NULL; 6827a5ca864Sbellard 683a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 684a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 685a517e88bSPaolo Bonzini */ 686bb345110SPaolo Bonzini struct sigaction sa_sigterm; 687bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 688bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 689bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 690c2297088SDaniel P. Berrange 691041e32b8SMax Reitz #ifdef CONFIG_POSIX 692041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 693041e32b8SMax Reitz #endif 694041e32b8SMax Reitz 695f5852efaSChristophe Fergeau error_init(argv[0]); 696fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 697e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 698c2297088SDaniel P. Berrange 6990ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 7000ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 70139ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 70210f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 703bb345110SPaolo Bonzini 7047a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 7057a5ca864Sbellard switch (ch) { 7067a5ca864Sbellard case 's': 7072f726488Sths flags |= BDRV_O_SNAPSHOT; 7082f726488Sths break; 7092f726488Sths case 'n': 71039a5235cSPaolo Bonzini optarg = (char *) "none"; 71139a5235cSPaolo Bonzini /* fallthrough */ 71239a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 71339a5235cSPaolo Bonzini if (seen_cache) { 71485b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 71585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 71639a5235cSPaolo Bonzini } 71739a5235cSPaolo Bonzini seen_cache = true; 7186effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 71985b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 72085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 72139a5235cSPaolo Bonzini } 7227a5ca864Sbellard break; 72339a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 72439a5235cSPaolo Bonzini if (seen_aio) { 72585b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 72685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 72739a5235cSPaolo Bonzini } 72839a5235cSPaolo Bonzini seen_aio = true; 72939a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 73039a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 73139a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 73239a5235cSPaolo Bonzini /* this is the default */ 73339a5235cSPaolo Bonzini } else { 73485b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 73585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 73639a5235cSPaolo Bonzini } 73739a5235cSPaolo Bonzini break; 738ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 739ded9d2d5SPaolo Bonzini if (seen_discard) { 74085b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 74185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 742ded9d2d5SPaolo Bonzini } 743ded9d2d5SPaolo Bonzini seen_discard = true; 744ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 74585b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 74685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 747ded9d2d5SPaolo Bonzini } 748ded9d2d5SPaolo Bonzini break; 749b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 750b3838a40SPeter Lieven detect_zeroes = 751f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 752b3838a40SPeter Lieven optarg, 753b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 754b3838a40SPeter Lieven &local_err); 755b3838a40SPeter Lieven if (local_err) { 756c29b77f9SMarkus Armbruster error_reportf_err(local_err, 757c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 75885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 759b3838a40SPeter Lieven } 760b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 761b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 76285b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 763b3838a40SPeter Lieven "without setting discard operation to unmap"); 76485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 765b3838a40SPeter Lieven } 766b3838a40SPeter Lieven break; 7677a5ca864Sbellard case 'b': 7687a5ca864Sbellard bindto = optarg; 7697a5ca864Sbellard break; 7707a5ca864Sbellard case 'p': 77148bec07eSDaniel P. Berrange port = optarg; 7727a5ca864Sbellard break; 7737a5ca864Sbellard case 'o': 77443b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 77543b51011SEric Blake error_report("Invalid offset '%s'", optarg); 77685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7777a5ca864Sbellard } 7787a5ca864Sbellard break; 7798c116b0eSWenchao Xia case 'l': 7808c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 78170b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 78270b94331SMarkus Armbruster optarg, false); 7838c116b0eSWenchao Xia if (!sn_opts) { 78485b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 7858c116b0eSWenchao Xia optarg); 78685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7878c116b0eSWenchao Xia } 7888c116b0eSWenchao Xia } else { 7898c116b0eSWenchao Xia sn_id_or_name = optarg; 7908c116b0eSWenchao Xia } 7918c116b0eSWenchao Xia /* fall through */ 7927a5ca864Sbellard case 'r': 793dbb38caaSEric Blake readonly = true; 79407108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 7957a5ca864Sbellard break; 7967a5ca864Sbellard case 'P': 7970ae2d546SEric Blake warn_report("The '-P' option is deprecated; use --image-opts with " 7980ae2d546SEric Blake "a raw device wrapper for subset exports instead"); 79943b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &partition) < 0 || 80043b51011SEric Blake partition < 1 || partition > 8) { 80143b51011SEric Blake error_report("Invalid partition '%s'", optarg); 80285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 803713cc671SPeter Lieven } 8047a5ca864Sbellard break; 805636192c4SEric Blake case 'B': 806636192c4SEric Blake bitmap = optarg; 807636192c4SEric Blake break; 808cd831bd7Sths case 'k': 809b32f6c28SPaolo Bonzini sockpath = optarg; 810713cc671SPeter Lieven if (sockpath[0] != '/') { 8119af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 81285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 813713cc671SPeter Lieven } 814cd831bd7Sths break; 815cd831bd7Sths case 'd': 816cd831bd7Sths disconnect = true; 817cd831bd7Sths break; 818cd831bd7Sths case 'c': 819cd831bd7Sths device = optarg; 820cd831bd7Sths break; 8213b05a8e9Sths case 'e': 82243b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 82343b51011SEric Blake shared < 1) { 82485b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 82585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8263b05a8e9Sths } 8273b05a8e9Sths break; 828e6b63677SDaniel P. Berrange case 'f': 829e6b63677SDaniel P. Berrange fmt = optarg; 830e6b63677SDaniel P. Berrange break; 83175818250Sths case 't': 83275818250Sths persistent = 1; 83375818250Sths break; 8343d4b2f9cSDaniel P. Berrange case 'x': 8353d4b2f9cSDaniel P. Berrange export_name = optarg; 836*93676c88SEric Blake if (strlen(export_name) > NBD_MAX_STRING_SIZE) { 837*93676c88SEric Blake error_report("export name '%s' too long", export_name); 838*93676c88SEric Blake exit(EXIT_FAILURE); 839*93676c88SEric Blake } 8403d4b2f9cSDaniel P. Berrange break; 841b1a75b33SEric Blake case 'D': 842b1a75b33SEric Blake export_description = optarg; 843*93676c88SEric Blake if (strlen(export_description) > NBD_MAX_STRING_SIZE) { 844*93676c88SEric Blake error_report("export description '%s' too long", 845*93676c88SEric Blake export_description); 846*93676c88SEric Blake exit(EXIT_FAILURE); 847*93676c88SEric Blake } 848b1a75b33SEric Blake break; 8497a5ca864Sbellard case 'v': 8507a5ca864Sbellard verbose = 1; 8517a5ca864Sbellard break; 8527a5ca864Sbellard case 'V': 8537a5ca864Sbellard version(argv[0]); 8547a5ca864Sbellard exit(0); 8557a5ca864Sbellard break; 8567a5ca864Sbellard case 'h': 8577a5ca864Sbellard usage(argv[0]); 8587a5ca864Sbellard exit(0); 8597a5ca864Sbellard break; 8607a5ca864Sbellard case '?': 86185b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 86285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8630ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 8640ab3b337SDaniel P. Berrange QemuOpts *opts; 8650ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 8660ab3b337SDaniel P. Berrange optarg, true); 8670ab3b337SDaniel P. Berrange if (!opts) { 8680ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 8690ab3b337SDaniel P. Berrange } 8700ab3b337SDaniel P. Berrange } break; 871145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 872145614a1SDaniel P. Berrange tlscredsid = optarg; 873145614a1SDaniel P. Berrange break; 87477c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 87577c9aaefSDaniel P. Berrange imageOpts = true; 87677c9aaefSDaniel P. Berrange break; 87739ca463eSDenis V. Lunev case 'T': 87839ca463eSDenis V. Lunev g_free(trace_file); 87939ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 88039ca463eSDenis V. Lunev break; 881b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 882b25e12daSDaniel P. Berrange tlsauthz = optarg; 883b25e12daSDaniel P. Berrange break; 884ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 885ffb31e1dSMax Reitz fork_process = true; 886ffb31e1dSMax Reitz break; 88768b96f15SEric Blake case 'L': 88868b96f15SEric Blake list = true; 88968b96f15SEric Blake break; 890637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 891637bc5a5SMax Reitz pid_file_name = optarg; 892637bc5a5SMax Reitz break; 8937a5ca864Sbellard } 8947a5ca864Sbellard } 8957a5ca864Sbellard 89668b96f15SEric Blake if (list) { 89768b96f15SEric Blake if (argc != optind) { 89868b96f15SEric Blake error_report("List mode is incompatible with a file name"); 89968b96f15SEric Blake exit(EXIT_FAILURE); 90068b96f15SEric Blake } 90168b96f15SEric Blake if (export_name || export_description || dev_offset || partition || 90268b96f15SEric Blake device || disconnect || fmt || sn_id_or_name || bitmap || 90368b96f15SEric Blake seen_aio || seen_discard || seen_cache) { 90468b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 90568b96f15SEric Blake exit(EXIT_FAILURE); 90668b96f15SEric Blake } 90768b96f15SEric Blake if (fork_process) { 90868b96f15SEric Blake error_report("List mode is incompatible with forking"); 90968b96f15SEric Blake exit(EXIT_FAILURE); 91068b96f15SEric Blake } 91168b96f15SEric Blake } else if ((argc - optind) != 1) { 912433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 913433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 91485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 91568b96f15SEric Blake } else if (!export_name) { 91668b96f15SEric Blake export_name = ""; 9177a5ca864Sbellard } 9187a5ca864Sbellard 9197e1e0c11SMarkus Armbruster qemu_opts_foreach(&qemu_object_opts, 9200ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 921495bf893SKevin Wolf qemu_nbd_object_print_help, &error_fatal); 9220ab3b337SDaniel P. Berrange 92339ca463eSDenis V. Lunev if (!trace_init_backends()) { 92439ca463eSDenis V. Lunev exit(1); 92539ca463eSDenis V. Lunev } 92639ca463eSDenis V. Lunev trace_init_file(trace_file); 92739ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 92839ca463eSDenis V. Lunev 929a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 930a721f53bSRichard W.M. Jones if (socket_activation == 0) { 931a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 932a721f53bSRichard W.M. Jones } else { 933a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 934a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 93568b96f15SEric Blake bindto, port, 93668b96f15SEric Blake list); 937a721f53bSRichard W.M. Jones if (err_msg != NULL) { 938a721f53bSRichard W.M. Jones error_report("%s", err_msg); 939a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 940a721f53bSRichard W.M. Jones } 94153fabd4bSPaolo Bonzini 94253fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 94353fabd4bSPaolo Bonzini if (socket_activation > 1) { 94453fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 94553fabd4bSPaolo Bonzini "LISTEN_FDS"); 94653fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 94753fabd4bSPaolo Bonzini } 948a721f53bSRichard W.M. Jones } 949a721f53bSRichard W.M. Jones 950145614a1SDaniel P. Berrange if (tlscredsid) { 951145614a1SDaniel P. Berrange if (sockpath) { 952145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 953145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 954145614a1SDaniel P. Berrange } 955145614a1SDaniel P. Berrange if (device) { 956145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 957145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 958145614a1SDaniel P. Berrange } 959b25e12daSDaniel P. Berrange if (tlsauthz && list) { 960b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 961b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 962b25e12daSDaniel P. Berrange } 96368b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 964145614a1SDaniel P. Berrange if (local_err) { 965145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 966145614a1SDaniel P. Berrange error_get_pretty(local_err)); 967145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 968145614a1SDaniel P. Berrange } 969b25e12daSDaniel P. Berrange } else { 970b25e12daSDaniel P. Berrange if (tlsauthz) { 971b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 972b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 973b25e12daSDaniel P. Berrange } 974145614a1SDaniel P. Berrange } 975145614a1SDaniel P. Berrange 97668b96f15SEric Blake if (list) { 97768b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 97868b96f15SEric Blake return qemu_nbd_client_list(saddr, tlscreds, bindto); 97968b96f15SEric Blake } 98068b96f15SEric Blake 9813c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 9823c1fa35dSEric Blake if (disconnect || device) { 9833c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 9843c1fa35dSEric Blake exit(EXIT_FAILURE); 9853c1fa35dSEric Blake } 9863c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 987cd831bd7Sths if (disconnect) { 988d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 989d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 99085b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 99185b01e09SMarkus Armbruster strerror(errno)); 99285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 993fc19f8a0SPaolo Bonzini } 994d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 995cd831bd7Sths 996d0d6ff58SDaniel P. Berrange close(nbdfd); 997cd831bd7Sths 998cd831bd7Sths printf("%s disconnected\n", argv[optind]); 999cd831bd7Sths 1000cd831bd7Sths return 0; 1001cd831bd7Sths } 10023c1fa35dSEric Blake #endif 1003cd831bd7Sths 1004ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 1005c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 1006c1f8fdc3SPaolo Bonzini pid_t pid; 1007c1f8fdc3SPaolo Bonzini int ret; 1008c1f8fdc3SPaolo Bonzini 1009fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 101085b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 101185b01e09SMarkus Armbruster strerror(errno)); 101285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1013c1f8fdc3SPaolo Bonzini } 1014c1f8fdc3SPaolo Bonzini 1015c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 1016c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 1017c1f8fdc3SPaolo Bonzini */ 1018c1f8fdc3SPaolo Bonzini pid = fork(); 101970d4739eSMax Reitz if (pid < 0) { 102085b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 102185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 102270d4739eSMax Reitz } else if (pid == 0) { 1023c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 1024e6df58a5SMax Reitz 1025e6df58a5SMax Reitz old_stderr = dup(STDERR_FILENO); 10269faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 1027c1f8fdc3SPaolo Bonzini 1028c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 1029c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 1030fc19f8a0SPaolo Bonzini if (ret < 0) { 103185b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 103285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1033c1f8fdc3SPaolo Bonzini } 1034c1f8fdc3SPaolo Bonzini 1035c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 1036c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1037c1f8fdc3SPaolo Bonzini } else { 1038c1f8fdc3SPaolo Bonzini bool errors = false; 1039c1f8fdc3SPaolo Bonzini char *buf; 1040c1f8fdc3SPaolo Bonzini 1041c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 1042c1f8fdc3SPaolo Bonzini * it closes the pipe. 1043c1f8fdc3SPaolo Bonzini */ 1044c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1045c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 1046c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 1047c1f8fdc3SPaolo Bonzini errors = true; 1048c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 1049fc19f8a0SPaolo Bonzini if (ret < 0) { 1050c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 1051c1f8fdc3SPaolo Bonzini } 1052c1f8fdc3SPaolo Bonzini } 1053fc19f8a0SPaolo Bonzini if (ret < 0) { 105485b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 105585b01e09SMarkus Armbruster strerror(errno)); 105685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1057c1f8fdc3SPaolo Bonzini } 1058c1f8fdc3SPaolo Bonzini 1059c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 1060c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 1061c1f8fdc3SPaolo Bonzini */ 1062c1f8fdc3SPaolo Bonzini exit(errors); 1063c1f8fdc3SPaolo Bonzini } 1064c1f8fdc3SPaolo Bonzini } 1065c1f8fdc3SPaolo Bonzini 1066a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 1067b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 1068b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 1069cd831bd7Sths } 1070cd831bd7Sths 1071e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 1072a721f53bSRichard W.M. Jones if (socket_activation == 0) { 107348bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 1074fc8135c6SJuan Quintela if (qio_net_listener_open_sync(server, saddr, 1, &local_err) < 0) { 1075e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1076a721f53bSRichard W.M. Jones error_report_err(local_err); 1077e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 1078a721f53bSRichard W.M. Jones } 1079a721f53bSRichard W.M. Jones } else { 1080e4849c1dSDaniel P. Berrange size_t i; 1081a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 1082e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 1083e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 1084e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 1085a721f53bSRichard W.M. Jones &local_err); 1086e4849c1dSDaniel P. Berrange if (sioc == NULL) { 1087e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1088a721f53bSRichard W.M. Jones error_report("Failed to use socket activation: %s", 1089a721f53bSRichard W.M. Jones error_get_pretty(local_err)); 1090a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 1091a721f53bSRichard W.M. Jones } 1092e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 1093e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1094e4849c1dSDaniel P. Berrange } 1095a721f53bSRichard W.M. Jones } 109648bec07eSDaniel P. Berrange 10972f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 1098565f65d2SMarkus Armbruster error_report_err(local_err); 10992f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 11002f78e491SChrysostomos Nanakos } 1101802ddc37SPaolo Bonzini bdrv_init(); 1102b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1103802ddc37SPaolo Bonzini 110477c9aaefSDaniel P. Berrange srcpath = argv[optind]; 110577c9aaefSDaniel P. Berrange if (imageOpts) { 110677c9aaefSDaniel P. Berrange QemuOpts *opts; 110777c9aaefSDaniel P. Berrange if (fmt) { 110877c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 110977c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 111077c9aaefSDaniel P. Berrange } 111177c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 111277c9aaefSDaniel P. Berrange if (!opts) { 111377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 111477c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 111577c9aaefSDaniel P. Berrange } 111677c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 111777c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1118efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 111977c9aaefSDaniel P. Berrange } else { 1120e6b63677SDaniel P. Berrange if (fmt) { 11214fbec260SMax Reitz options = qdict_new(); 112246f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1123e6b63677SDaniel P. Berrange } 1124efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 112577c9aaefSDaniel P. Berrange } 112677c9aaefSDaniel P. Berrange 11274fbec260SMax Reitz if (!blk) { 1128c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1129c29b77f9SMarkus Armbruster argv[optind]); 113085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1131802ddc37SPaolo Bonzini } 11324fbec260SMax Reitz bs = blk_bs(blk); 1133802ddc37SPaolo Bonzini 11346effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 11356effd5bfSKevin Wolf 11368c116b0eSWenchao Xia if (sn_opts) { 11378c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 11388c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 11398c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 11408c116b0eSWenchao Xia &local_err); 11418c116b0eSWenchao Xia } else if (sn_id_or_name) { 11428c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 11438c116b0eSWenchao Xia &local_err); 11448c116b0eSWenchao Xia } 11458c116b0eSWenchao Xia if (ret < 0) { 1146c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 114785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11488c116b0eSWenchao Xia } 11498c116b0eSWenchao Xia 1150b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 11514c58e80aSMax Reitz fd_size = blk_getlength(blk); 115298f44bbeSMax Reitz if (fd_size < 0) { 115385b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 115498f44bbeSMax Reitz strerror(-fd_size)); 115585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 115698f44bbeSMax Reitz } 1157802ddc37SPaolo Bonzini 1158e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 11599d26dfcbSEric Blake error_report("Offset (%" PRIu64 ") has to be smaller than the image " 11609d26dfcbSEric Blake "size (%" PRId64 ")", dev_offset, fd_size); 1161e424b655STomáš Golembiovský exit(EXIT_FAILURE); 1162e424b655STomáš Golembiovský } 1163e424b655STomáš Golembiovský fd_size -= dev_offset; 1164e424b655STomáš Golembiovský 116543b51011SEric Blake if (partition) { 11669d26dfcbSEric Blake uint64_t limit; 11674485936bSEric Blake 11684485936bSEric Blake if (dev_offset) { 11694485936bSEric Blake error_report("Cannot request partition and offset together"); 11704485936bSEric Blake exit(EXIT_FAILURE); 11714485936bSEric Blake } 11724485936bSEric Blake ret = find_partition(blk, partition, &dev_offset, &limit); 1173185b4338SPaolo Bonzini if (ret < 0) { 117485b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 1175a4699e55SMarkus Armbruster strerror(-ret)); 117685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1177802ddc37SPaolo Bonzini } 11784485936bSEric Blake /* 11794485936bSEric Blake * MBR partition limits are (32-bit << 9); this assert lets 11809d26dfcbSEric Blake * the compiler know that we can't overflow 64 bits. 11814485936bSEric Blake */ 11829d26dfcbSEric Blake assert(dev_offset + limit >= dev_offset); 11834485936bSEric Blake if (dev_offset + limit > fd_size) { 11849d26dfcbSEric Blake error_report("Discovered partition %d at offset %" PRIu64 11859d26dfcbSEric Blake " size %" PRIu64 ", but size exceeds file length %" 11869d26dfcbSEric Blake PRId64, partition, dev_offset, limit, fd_size); 11874485936bSEric Blake exit(EXIT_FAILURE); 11884485936bSEric Blake } 11894485936bSEric Blake fd_size = limit; 1190185b4338SPaolo Bonzini } 1191802ddc37SPaolo Bonzini 11923fa4c765SEric Blake export = nbd_export_new(bs, dev_offset, fd_size, export_name, 1193dbb38caaSEric Blake export_description, bitmap, readonly, shared > 1, 1194678ba275SEric Blake nbd_export_closed, writethrough, NULL, 1195678ba275SEric Blake &error_fatal); 11963b05a8e9Sths 1197f1ef5555SPaolo Bonzini if (device) { 11983c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1199f1ef5555SPaolo Bonzini int ret; 1200f1ef5555SPaolo Bonzini 1201a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1202f1ef5555SPaolo Bonzini if (ret != 0) { 120385b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 120485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1205f1ef5555SPaolo Bonzini } 12063c1fa35dSEric Blake #endif 1207f1ef5555SPaolo Bonzini } else { 1208f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1209f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1210f1ef5555SPaolo Bonzini } 1211f1ef5555SPaolo Bonzini 1212d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 12137a5ca864Sbellard 1214637bc5a5SMax Reitz if (pid_file_name) { 1215637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1216637bc5a5SMax Reitz } 1217637bc5a5SMax Reitz 12189faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 12199faf31b6SMichael Tokarev * to free any busy filesystems */ 12209faf31b6SMichael Tokarev if (chdir("/") < 0) { 122185b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 122285b01e09SMarkus Armbruster strerror(errno)); 122385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 12249faf31b6SMichael Tokarev } 12259faf31b6SMichael Tokarev 1226ffb31e1dSMax Reitz if (fork_process) { 1227ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1228ffb31e1dSMax Reitz close(old_stderr); 1229ffb31e1dSMax Reitz } 1230ffb31e1dSMax Reitz 12317860a380SPaolo Bonzini state = RUNNING; 12323b05a8e9Sths do { 1233a61c6782SPaolo Bonzini main_loop_wait(false); 12347860a380SPaolo Bonzini if (state == TERMINATE) { 12357860a380SPaolo Bonzini state = TERMINATING; 12369d976580SPhilippe Mathieu-Daudé nbd_export_close(export); 12379d976580SPhilippe Mathieu-Daudé nbd_export_put(export); 12389d976580SPhilippe Mathieu-Daudé export = NULL; 12397860a380SPaolo Bonzini } 12407860a380SPaolo Bonzini } while (state != TERMINATED); 12412c8d9f06SPaolo Bonzini 124226f54e9aSMarkus Armbruster blk_unref(blk); 1243b32f6c28SPaolo Bonzini if (sockpath) { 1244b32f6c28SPaolo Bonzini unlink(sockpath); 1245b32f6c28SPaolo Bonzini } 12467a5ca864Sbellard 12478c116b0eSWenchao Xia qemu_opts_del(sn_opts); 12488c116b0eSWenchao Xia 1249a517e88bSPaolo Bonzini if (device) { 1250a517e88bSPaolo Bonzini void *ret; 1251a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1252a517e88bSPaolo Bonzini exit(ret != NULL); 1253a517e88bSPaolo Bonzini } else { 1254a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1255a517e88bSPaolo Bonzini } 12567a5ca864Sbellard } 1257